My hololens can not load vuforia-based application

I developed an UWP application combined unity and vuforia, whose main function is to identify my card and add a sphere above it. My settings are all right and it can run in unity, as shown in following.

However, when I build the uwp application and run it, some issues appears. Opening this app, a white interface would emerge and it keeps loading something, seconds later, the little black circle stops rotating and a sleeping market shows. It's the same in both emulator and the Hololens glass. Otherwise, the added sphere never showed when the card appears in my vision. So why? And what should I do to solve it?

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